Toa DP-L2 User Manual v.2.00

OPERATING INSTRUCTIONS

DIGITAL AMBIENT NOISE CONTROLLER

DP-L2

(Version 2.00)

Thank you for purchasing TOA's Digital Ambient Noise Controller. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

TABLE OF CONTENTS

1. SAFETY PRECAUTIONS ................................................................................ 3

2. GENERAL DESCRIPTION .............................................................................. 5

3. FEATURES ........................................................................................................... 5

4. HANDLING PRECAUTIONS ........................................................................... 5

5. NOMENCLATURE AND FUNCTIONS

Front .......................................................................................................................... 6

Rear ........................................................................................................................... 7

6. SETTINGS

6.1. Setting Operations and Setting Screens

6.1.1. Keys and knobs used in settings ............................................................. 8

6.1.2. On-screen indications .............................................................................. 9

6.2. Setting Flow Charts

6.2.1. System setting flow chart ...................................................................... 10

6.2.2. ALC function setting flow chart .............................................................. 11

6.2.3. ANC function setting flow chart .............................................................. 12

6.2.4. ALC and ANC functions ON/OFF settings ............................................. 13

6.2.5. INPUT LEVEL, OUTPUT LEVEL,

and ALC LEVEL indication selection ..................................................... 14

6.3. Setting Procedures .......................................................................................... 14

6.4. Key Lock Function Settings

6.4.1. Locking the keys .................................................................................... 21

6.4.2. Releasing the locked state ..................................................................... 21

6.5. Restoring Default Settings ............................................................................... 22

7. CONNECTIONS

7.1. Removable Terminal Plug Connection ............................................................ 23

7.2. Example 1: Input and Output Connections

(When Connecting to a Stereo Mixer's Outputs) .............................................. 24

7.3. Example 2: Input and Output Connections

(When Connecting to a BGM Player's Outputs) ............................................... 24

8. RACK MOUNTING ........................................................................................... 25

9. BLOCK DIAGRAM ........................................................................................... 26

10. RECORDING TABLE OF FUNCTION SETTINGS ................................. 27

11. SPECIFICATIONS ............................................................................................ 28

Accessories ............................................................................................................. 28

Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury.

WARNING

1. SAFETY PRECAUTIONS

• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation.

• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or cautions regarding safety.

• After reading, keep this manual handy for future reference.

Safety Symbol and Message Conventions

Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling. Before operating your product, read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.

When Installing the Unit

• Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing so may result in fire or electric shock.

• Use the unit only with the voltage specified on the unit. Using a voltage higher than that which is specified may result in fire or electric shock.

• Do not cut, kink, otherwise damage nor modify the power supply cord. In addition, avoid using the power cord in close proximity to heaters, and never place heavy objects -- including the unit itself -- on the power cord, as doing so may result in fire or electric shock.

• Since the unit is designed for in-door use, do not install it outdoors. When it gets wet with rain, there is a danger of electric shock.

• Do not touch a plug during thunder and lightning, as this may result in electric shock.

When the Unit is in Use

• To prevent a fire or electric shock, never open nor remove the unit case as there are high voltage components inside the unit. Refer all servicing to your nearest TOA dealer.

• Should the following irregularity be found during use, immediately switch off the power, disconnect the power supply plug from the AC outlet and contact your nearest TOA dealer. Make no further attempt to operate the unit in this condition as this may cause fire or electric shock.

· If you detect smoke or a strange smell coming from the unit.

· If water or any metallic object gets into the unit

· If the unit falls, or the unit case breaks

· If the power supply cord is damaged (exposure of the core, disconnection, etc.)

· If it is malfunctioning (no tone sounds.)

• Do not place cups, bowls, or other containers of liquid or metallic objects on top of the unit. If they accidentally spill into the unit, this may cause a fire or electric shock.

• Do not insert nor drop metallic objects or flammable materials in the ventilation slots on the unit's sides and rear, as this may result in fire or electric shock.

Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or property damage.

CAUTION

When Installing the Unit

• Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock.

• When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord itself. Operating the unit with a damaged power supply cord may cause a fire or electric shock.

• When moving the unit, be sure to remove its power supply cord from the wall outlet. Moving the unit with the power cord connected to the outlet may cause damage to the power cord, resulting in fire or electric shock. When removing the power cord, be sure to hold its plug to pull.

• Do not block the ventilation slots on the unit's sides and rear. Doing so may cause heat to build up inside the unit and result in fire.

• Avoid installing the unit in humid or dusty locations, in locations exposed to the direct sunlight, near the heaters, or in locations generating sooty smoke or steam as doing otherwise may result in fire or electric shock.

• Be sure to follow the instructions below when rack-mounting the unit. Failure to do so may cause a fire or personal injury.

· Install the equipment rack on a stable, hard floor. Fix it with anchor bolts or take other arrangements to

prevent it from falling down.

· When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to

the unit.

• The socket-outlet shall be installed near the equipment and the plug shall be easily accessible.

Lors de l'installation de l'appareil

• La prise doit être installée à proximité de l'équipement et la fiche doit être facilement accessible.

When the Unit is in Use

• If dust accumulates on the power supply plug or in the wall AC outlet, a fire may result. Clean it periodically. In addition, insert the plug in the wall outlet securely.

• Switch off the power, and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving the unit unused for 10 days or more. Doing otherwise may cause a fire or electric shock.

2. GENERAL DESCRIPTION

TOA's DP-L2 is a 1U size* rack-mountable digital audio processor having an ambient noise control (ANC) function which automatically adjusts output sounds in response to changes in ambient noise level. It also features an automatic level control (ALC) function that automatically adjusts the input signal level to an appropriate level.

*1U size: 44.5 mm (standard size)

3. FEATURES

• ANC function distinguishes between the unit's output sound and the ambient noise. (The unit's output sound is not detected as noise.)

• Various types of microphones, including ceiling flush mounted, dynamic and condenser types, usable for detecting ambient noise.

• Monitoring of sound collected via the ambient noise sensor microphone.

• Front-mounted LED meters for the input and output signal levels, and ALC and ANC levels.

• Easy setting of each function with the front-mounted LCD (liquid crystal display), keys and knobs.

4. HANDLING PRECAUTIONS

• The supplied power supply cord is designed for exclusive use with this unit. Never use it with other equipment.

• Install the unit in locations where the temperature is between 0 and +40°C and the moisture is less than 90% (no dew condensation must be formed).

• The DP-L2 is a precision audio component. To prevent failure, avoid locations where the unit may be exposed to strong shocks or vibrations.

• To clean, be sure to first switch off the unit's power, then wipe with a dry cloth. When the unit gets very dirty, use a cloth damped in a neutral cleanser. Never use benzene, thinner or chemically-treated cleaning cloth because such volatile liquids could deform or discolor the unit.

• FCC Rules (CU version) and Class A ITE (CE version)

The CU version complies with Part 15 of the FCC Rules.

The CE version complies with Class A ITE.

Warning

This is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures.

Note

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

Modifications

Any modifications made to this device that are not approved by TOA Corporation may void the authority granted to the user by the FCC to operate this equipment.

5. NOMENCLATURE AND FUNCTIONS

[Front]

1. Power indicator

Lights when the power is switched on. Tip: The power switch (17) is located on the rear

panel.

2. Sensitivity controls

Adjust the input sensitivity for SENSOR input, INPUT 1, and INPUT 2. Factory-setting: 0 dB (center position).

3. SETTING key

Used to set each function. If this key is pressed, the setting screen is displayed on the LCD screen.

4. METER indication selector key

Indications of channels for which the signal level is displayed cycle through S (SENSOR level), 1 (Channel 1), and 2 (Channel 2) with each depression of this key. (See p. 14.)

5. Liquid crystal display

Pressing each function key displays the corresponding setting screen on this display. If any key is not used for a specified period of time while the setting screen is displayed, the ALC and ANC levels are displayed.

6. PARAMETER/PUSH-ENTER knob

Rotate this knob to change parameters or select the setting contents on the setting screen. (Such parameters and setting contents changed with this knob begin to work in real time.) To save the current parameters, press this knob while the setting screen is displayed.

Note

If not saved, newly set parameters are cancelled when the power is switched off or the RESET key is pressed. Pressing this knob when the PUSH ENTER indication is displayed validates the onscreen setting item and saves the current parameters.

7. BACK key

Returns the setting item display to a previous screen.

8. NEXT key

Advances the setting item display to a next screen.

9. ALC key

Permits the ALC function to be set to ON or OFF by means of the PARAMETER knob (6). If both this key and the SETTING key (3) are simultaneously pressed, settings for the ALC function can be performed.

10. INPUT LEVEL indicator

Indicates the input signal level of the channel selected with the METER indication selector key (4). (See p. 14.)

11. ALC LEVEL indicator

Indicates the amount of gain controlled by the ALC function.

12. MAXIMUM OUTPUT level control

Sets the maximum output level if rotated.

13. ANC key

Permits the ANC function to be set to ON or OFF by means of the PARAMETER knob (6). If both this key and the SETTING key (3) are simultaneously pressed, settings for the ANC function can be performed.

14. OUTPUT LEVEL indicator

Indicates the output signal level of the channel selected with the METER indication selector key (4). (See p. 14.)

15. ANC LEVEL indicator

Indicates the amount of gain controlled by the ANC function.

16. RESET key

Reactivates the unit. Tip: Each set data stays stored, and is not

erased.

5 6 7

8 91011

131415 16

[Rear]

17. Power switch

Turns on and off the power. Tip: The Power indicator (1) is located on the front

panel.

18. AC inlet

Connect this inlet to the AC wall outlet using the supplied power cord.

19. Functional earth terminal

Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal to the functional earth terminal of the external equipment may reduce the hum noise.

Note: This terminal is not for protective earth.

20. RS-232C Communication port (Non LPS)

Used for maintenance purposes, and not normally used.

21. OUTPUT 1 and 2 terminals (+4 dB*, 600Ω)

Electronically-balanced outputs of removable terminal blocks. Polarity: E=Ground, C=Cold, H=Hot

Note: Be sure to use the supplied 3P removable

terminal plugs for connection. (See p. 23.)

22. MONITOR OUT terminal (+4 dB*, 600Ω)

Electronically-balanced output of removable terminal block. Polarity: E=Ground, C=Cold, H=Hot

Note: Be sure to use the supplied 3P removable

terminal plug for connection. (See p. 23.)

23. INPUT 1 and 2 terminals (+4/–8/–20 dB* changeable, 15 kΩ)

Electronically-balanced inputs of removable terminal blocks. Polarity: E=Ground, C=Cold, H=Hot

Note: Be sure to use the supplied 3P removable

terminal plugs for connection. (See p. 23.)

24. Ground lift switches

When the unit is connected to external equipment, a ground may create a loop, potentially generating a hum noise. In such cases, the ground loop can be cut off by setting the corresponding switch to the LIFT position. Normally, set both switches to the NORM position.

25. SENSOR input terminal (+4/–48 dB* changeable, 10 kΩ)

Electronically-balanced input of removable terminal block. Polarity: E=Ground, C=Cold, H=Hot Power of 15 V DC/10 mA can be supplied from the rightmost "+15 V DC" pin terminal.

Note: Be sure to use the supplied 4P removable

terminal plug for connection. (See p. 23.)

26. PHANTOM power switch

Turn on the switch when using a phantompowered sensor microphone, and the phantom power of 15 V DC is supplied. Otherwise, when using other type of sensor microphone or other equipment, be sure to turn off the switch.

*0 dB = 0.775 V

17 18 19 20 21 22 23

6. SETTINGS

6.1. Setting Operations and Setting Screens

6.1.1. Keys and knobs used in settings

(1) SETTING Key

Permits the system setting screen to display. If this key is pressed simultaneously with the ALC key, the ALC setting screen is displayed. If pressed simultaneously with the ANC key, the ANC setting screen is displayed.

(2) METER Indication Selector Key

Selects the channel for which the signal level is indicated by the INPUT LEVEL, OUTPUT LEVEL and ALC LEVEL indicators. The on-screen indication cycles through S (SENSOR level), 1 (Channel 1), and 2 (Channel 2) as the key is pressed.

(3) PARAMETER/PUSH-ENTER Knob

Rotating this knob while [ ] is flashing in the setting screen permits either the setting content or parameter to be selected. (Such parameters and setting contents changed begin to work in real time.) Pressing this knob afterward permits [ ] display to disappear, saving the current parameters. Pressing this knob when the PUSH ENTER indication is displayed validates the on-screen setting item and saves the current parameters.

(4) BACK Key

Returns the display to a previous screen.

(5) NEXT Key

Advances the display to a next screen.

(6) ALC Key

Permits the ALC function to be set to ON or OFF by rotating the PARAMETER knob. If this key is pressed simultaneously with the SETTING key, the ALC setting screen is displayed.

(7) ANC Key

Permits the ANC function to be set to ON or OFF by rotating the PARAMETER knob. If this key is pressed simultaneously with the SETTING key, the ANC setting screen is displayed.

(1)

(7)(3) (4)

(2) (5) (6)

6.1.2. On-screen indications

[ALC/ANC level indication screen]

Displayed when in normal operation state.

[Setting screen]

ALC1 0dB METER

ANC 1 OF F S1 2

Indicates ALC and ANC levels or their OFF states.

GAT E LEVEL

INPUT2 –60dB

The signal level of the highlighted channel is displayed by the INPUT LEVEL, OUTPUT LEVEL, and ALC LEVEL indicators. The selected channel moves cyclically among S (SENSOR level), 1 (Channel 1), and 2 (Channel 2) as the Meter indication selector key is pressed.

Appears when there is a previous screen.

Appears when there is a next screen.

Displays the setting content or value. Varies as the PARAMETER knob is rotated.

INPUTSENSE SET

PUSH ENTER

Displays the setting items.

Press the PUSH-ENTER knob when this indication is displayed.

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